National Tooth Crown Co. v. Macdonald

Citations

• 117 F. 617
• 1902 U.S. App. LEXIS 5118

Syllabus

<p>1. Patents—Invention—Substitution op Materials.</p> <p>Substitution of materials used as means for making an article is not invention, unless such substitution involves a new mode of construction, or develops new uses and properties of the article made, or unless the substituted material is more efficient in action.</p> <p>3. Same—Mold por Marino Tooth Crowns.</p> <p>The White patent, No. 571,102, for a mold for shaping metallic tooth crowns, was anticipated by the Parker patent, No. 537,481, for a swage for dental plates and analogous articles; the operation of the two devices being practically the same, and the only substantial difference being in the material used for swaging purposes.</p>